Inglot has often looked very nervous, and he and Murray were not altogether convincing in their only previous victory together in Serbia last summer.

Some early mistakes from Inglot, along with a Murray double fault, set the tone in the second-set tie-break but Inglot was arguably the best player across the match as a whole.

He created a chance for a break of the Pospisil serve at 2-2 with a brilliant return only to miss the follow-up volley, and Britain spurned more chances four games later.

But, as in the first set, they made a great start to the tie-break and did not look back.

Pospisil had tape on his left knee after receiving treatment to it on Friday and it was he who was in trouble on serve again in the sixth game of the fourth set.

He saved two break points but dumped a volley into the net on the third and it was fitting that it was Inglot who served out the victory.

Victory for Evans against Pospisil in the first match on Sunday would clinch the tie for Britain, while a win for the Canadian would set up a decisive fifth rubber between Kyle Edmund and 17-year-old Denis Shapovalov.

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